Adjustable chair



0. H. SCHRAM.

ADJUSTABLE CHAIR.

APPLl-CATION men APR.26, 1920.

1,393,457, Patented Oct, 11, 1921.

. 2 SHEETS-SHEET l- .9 L.- Z 2 0 z,

' 0 H.- SCHRAM;

ADJUSTABLE CHAIR.

APPLICATION FILED APR.26, I920- Patented Oct. H, 1921.,

2 SHEETS- SHEET 2- 9 m. a l

improvements in chair *of ineans for adjusting the.

i to provide a simple, commercially practicable chalr wherein theeffective height of the 25.1

particularly the seat citizen of the United new and useful Improvementsin following is a full, clear, tion thereof.

in the present embodiment of appreciated that which it would OSCAR s.scnzean, or

OSHKOSH, WISOON SIN.

aDJbsrABLE CHAIR.

Application filed April 26,

To all whom it may aonceim:

Be it known that 1, Oscar: Hi Sc mitar, a States, and resident ofOshkosh, in the county of Winnebiigo and State ofVVisconsin, haveinvented certain Adjustable declare that the and exact descrip-Chairsyand I do hereby hers thereof may be may be inclined downwardlytoward its rear 'end to suit the comfort requlrernents of the :justmentof this user. i u It is further my object to provlde an adcharacterwhich may be effected in a most convenient and ready man 1 her, and tothis end it is more particularly Iny object to providean arrangement forcounter-balancing the normal weight of the upper portion of the chairwith respect to theadjustable leg members whereby theseat member may bethus adjusted with a mini? mum amount of effort.

A stillfurther object is to embody the aforerecited features ofconstruction in a i rocker chair of the heavy upholstered type I whereinthe operative parts of the lng mechanism adjustare housed withinth'e'structure of the chair in such manner :as not to detract from thedesired attractive appearance of the chair structure.

"With the above and other objects and advantages in view, which will beapparent asth'e description proceeds, my invention.

resides in the novelieatures of construction, combinatlon andarrangement of the parts Specification oit letters Patent.

as hereinafter described and through the ch operating handle lever,section .Fig. 3.

Patented Oct. ilil, 1921i 1920. serial in. 376,652,

appended claims.

In the accompanying drawings Figure .1 is a vertical sectional Viewthrough a rocker chair constructed in accordance with my invention, theplane of this section'being indicated by the line 1-1 of Fig. r V i Fig.2 is a side elevational view lower portion of the frame structure chair.y Fig. 3lS a. sectional view defined the of the chairin a plane at rightanglesto the plane of Fig; 1, as indicated bythe line 3- 3 of Fig. l 13horizontal sectional iew fLlI' Oll a plane indicated by the line 4% ofFig; 1. V

Fig. 5 s a detail sectional view of the being indicated by theline- 5-5of Referring P t ularl t th drawings,

now more ment of my invention,

respectively. Back with and 'extendupwardly irom the rear cross pieces9, while arm rest posts 10 exthrough the.-

the plane of this the :frame work of the chair structure constitutingthe present embodi comprises the usual *froiit, rear and sideseat boxsills 5, 6 and 7;

of the tend upwardly from the forward corners oi the chairbox and areconnected with these parts, and in completing the chair,

all of these parts would be suitably cush-' ioned and upholstered.

The sills of the seat box are connected by the usual triangular braceblocks 13 set in the corners of the box and suitably fixed tothe sills.

By reason of the depth of the cushion seatlstructure in the present typeof chair, the legs of the chair are relatively short, and the front legs1d of the chairare rigidly secured toarcu'ate rocker bars 15, the upperendportions of the legs being reduced and passed through apertures inthe forward brace blocks 13, this. reduction of the upper portions ofthe legs forming consequent shoulders le which substantially abut thebottonrcorner portions of the seat box. The reduced leg portionsareslightly loose in the blocks 13 whereby they aretpermitbox sill 6"beingcut away ted slight movement in a direction longitudinally of the rockerbars, and this movement is rendered pivotal in nature by pins 16 passingthrough the upper portions of the legs and through the side sills 7 andblocks 13. 7

The rear legs 17 of the chair are rigidly secured to the rear portionsof the rocker bars 15 and have their upper end portions reducedsimilarly to the front legs, the reduced portions belng slidable inapertures m the rear brace blocks 13 and this reduction of the rear legsforms consequent shoulders "18 at the intermediate portions of the legs,

. a certain pivotal movement of the front movement of the 3D legs andsecured to the 'tractile coil springs legs 14, although in practice thispivotal front legs is inconsequential. The weight of the seat and backstructure of the chair is counter-balanced by coir 19 secured to thebracket arms 20 at'the upper extremities of the rear rear corner braces13,

wliicl1 are disposed therebelow.

I adj ustably [The rear porton of the seat structure is held at anydesired elevation by a pair of levers 21, intermediately pivoted to theseat structure, preferably at the inner face of the rear box sill 6, theouter end portions of theselevers passing into the upper portions of therearlegs legs.

17 ,,through wear plates 22 secured to the inner sides of said The innerends of the levers 21'have common pivotal connection with an'operatmglink.21 which "extends upwardly in the substantial plane of theback ofthe chair and which is pivotally connected with a crank arm 23 on oneend of a stub shaft 24 which is j'ournaled in a bearing bracket 25secured to and depending from the upper cross piece 9 of the backstructure. The outer end of the shaft carries an'upstanding lever 26 andthis handle lever is ad ustably held in any desired position by aplunger bar 27 slidable through a longitudinal bore in'the handleandprojecting from the outer end of the handle, the inner en l of thebar 27 being I bentlaterally 'and'passed through a long 'tudinal slot inthe handle lever and constituting a pawl member28 selectively engageablein recesses of a rack segment 29 secured to the rear face of the crosspiece 9, the pawl member being resiliently urged to engaging by a coilspring 30 disposed in the crank arm 23 member. It is noted that the andextending into the recesses ment of the seat structure is shielded inthe present structure by angle plates 31 extending about theintermediate portions of the rear legs and having their ends securedrespectively to the side sills 7 and the rear sill (5, said angle platesalso forming a stationary corner structure for the seat box and servingto brace the general structure, arms 32 extending upwardly from theplates for securement to the lower ends of the rear posts 8 to provideadditional bracing means.

I have thus provided a fairly simple structure which may be readilyincorporated in the construction of a chair of the type herein shown,and of other types of chairs, and which provides for a ready adjustmentof the inclination of the-seat member of the chair to meet therequirements of the user. by simply rocking the handle lever 26, thepawl of said lever being released by simply depressing the plunger 27with the linger of the hand which grasps the lever. It is noted that thespring 27 counterbalanccs the weight of the seat member from the levermechanism when procuring the desired adjustment. It will further beappreciated that while I have shown lever connections for adjusting thelegs 1?, the same results might be accomplished by permitting the legsto slide freely within the frame and using a bolt and wing lock to lockthem in desiredor adjusted position.

While I have shown and described a preferred embodiment of my invention,it will be appreciated that various changes and modifications ofstructure and arrangement may be employed to meet differing conditionsof use and manufacture without departing in any manner from the spiritof my invention.

What is claimed is:

1. A chair comprising a seat member, support legs for said seat membermovable relative thereto, a pair of levers pivotally connected with theseat member and engaging said support legs, a common control lever, linkmeans connecting said common control lever and said pair of lovers andmeans for holding said common control lever against movement. 7

2. A chair comprising a seat member including a frame, triangular cornerbraces in said frame provided with recesses, front legs having theirupper end portions reduced and having slight lateral movement therein.the reduction of said front legs forming intermediate lUi shouldersengageable with the seat frame, rear legs having slidable engagementwith the seat member and means for adjustably holding said ment.

3. A chair including a seat frame having its rear corner portions cutaway, front legs connected With the forward corner portions of the seatframe, rear legs having their intermecliate portions slidable in the cutaway rear corner portions of the frame, angular the frame and means forrear legs against sliding move shield plates disposed about the cut awayportions of the frame and rigidly secured to adjustably hold- 111g saidframe and rear legs against relative movement.

In testimony that I claim the foregoing I have hereunto set. my hand atOshkosh, in the county of Winnebago and State of Wisoonsin.

OSCAR H. SQHRAM.

